gobot.io/x/gobot@v1.16.0/drivers/i2c/bmp280_driver_test.go (about)

     1  package i2c
     2  
     3  import (
     4  	"bytes"
     5  	"errors"
     6  	"testing"
     7  
     8  	"gobot.io/x/gobot"
     9  	"gobot.io/x/gobot/gobottest"
    10  )
    11  
    12  var _ gobot.Driver = (*BMP280Driver)(nil)
    13  
    14  // --------- HELPERS
    15  func initTestBMP280Driver() (driver *BMP280Driver) {
    16  	driver, _ = initTestBMP280DriverWithStubbedAdaptor()
    17  	return
    18  }
    19  
    20  func initTestBMP280DriverWithStubbedAdaptor() (*BMP280Driver, *i2cTestAdaptor) {
    21  	adaptor := newI2cTestAdaptor()
    22  	return NewBMP280Driver(adaptor), adaptor
    23  }
    24  
    25  // --------- TESTS
    26  
    27  func TestNewBMP280Driver(t *testing.T) {
    28  	// Does it return a pointer to an instance of BME280Driver?
    29  	var bmp280 interface{} = NewBMP280Driver(newI2cTestAdaptor())
    30  	_, ok := bmp280.(*BMP280Driver)
    31  	if !ok {
    32  		t.Errorf("NewBMP280Driver() should have returned a *BMP280Driver")
    33  	}
    34  }
    35  
    36  func TestBMP280Driver(t *testing.T) {
    37  	bmp280 := initTestBMP280Driver()
    38  	gobottest.Refute(t, bmp280.Connection(), nil)
    39  }
    40  
    41  func TestBMP280DriverStart(t *testing.T) {
    42  	bmp280, _ := initTestBMP280DriverWithStubbedAdaptor()
    43  	gobottest.Assert(t, bmp280.Start(), nil)
    44  }
    45  
    46  func TestBMP280StartConnectError(t *testing.T) {
    47  	d, adaptor := initTestBMP280DriverWithStubbedAdaptor()
    48  	adaptor.Testi2cConnectErr(true)
    49  	gobottest.Assert(t, d.Start(), errors.New("Invalid i2c connection"))
    50  }
    51  
    52  func TestBMP280DriverStartWriteError(t *testing.T) {
    53  	bmp280, adaptor := initTestBMP280DriverWithStubbedAdaptor()
    54  	adaptor.i2cWriteImpl = func([]byte) (int, error) {
    55  		return 0, errors.New("write error")
    56  	}
    57  	gobottest.Assert(t, bmp280.Start(), errors.New("write error"))
    58  }
    59  
    60  func TestBMP280DriverStartReadError(t *testing.T) {
    61  	bmp280, adaptor := initTestBMP280DriverWithStubbedAdaptor()
    62  	adaptor.i2cReadImpl = func(b []byte) (int, error) {
    63  		return 0, errors.New("read error")
    64  	}
    65  	gobottest.Assert(t, bmp280.Start(), errors.New("read error"))
    66  }
    67  
    68  func TestBMP280DriverHalt(t *testing.T) {
    69  	bmp280 := initTestBMP280Driver()
    70  
    71  	gobottest.Assert(t, bmp280.Halt(), nil)
    72  }
    73  
    74  func TestBMP280DriverMeasurements(t *testing.T) {
    75  	bmp280, adaptor := initTestBMP280DriverWithStubbedAdaptor()
    76  	adaptor.i2cReadImpl = func(b []byte) (int, error) {
    77  		buf := new(bytes.Buffer)
    78  		// Values produced by dumping data from actual sensor
    79  		if adaptor.written[len(adaptor.written)-1] == bmp280RegisterCalib00 {
    80  			buf.Write([]byte{126, 109, 214, 102, 50, 0, 54, 149, 220, 213, 208, 11, 64, 30, 166, 255, 249, 255, 172, 38, 10, 216, 189, 16})
    81  		} else if adaptor.written[len(adaptor.written)-1] == bmp280RegisterTempData {
    82  			buf.Write([]byte{128, 243, 0})
    83  		} else if adaptor.written[len(adaptor.written)-1] == bmp280RegisterPressureData {
    84  			buf.Write([]byte{77, 23, 48})
    85  		}
    86  		copy(b, buf.Bytes())
    87  		return buf.Len(), nil
    88  	}
    89  	bmp280.Start()
    90  	temp, err := bmp280.Temperature()
    91  	gobottest.Assert(t, err, nil)
    92  	gobottest.Assert(t, temp, float32(25.014637))
    93  	pressure, err := bmp280.Pressure()
    94  	gobottest.Assert(t, err, nil)
    95  	gobottest.Assert(t, pressure, float32(99545.414))
    96  	alt, err := bmp280.Altitude()
    97  	gobottest.Assert(t, err, nil)
    98  	gobottest.Assert(t, alt, float32(149.22713))
    99  }
   100  
   101  func TestBMP280DriverTemperatureWriteError(t *testing.T) {
   102  	bmp280, adaptor := initTestBMP280DriverWithStubbedAdaptor()
   103  	bmp280.Start()
   104  
   105  	adaptor.i2cWriteImpl = func([]byte) (int, error) {
   106  		return 0, errors.New("write error")
   107  	}
   108  	temp, err := bmp280.Temperature()
   109  	gobottest.Assert(t, err, errors.New("write error"))
   110  	gobottest.Assert(t, temp, float32(0.0))
   111  }
   112  
   113  func TestBMP280DriverTemperatureReadError(t *testing.T) {
   114  	bmp280, adaptor := initTestBMP280DriverWithStubbedAdaptor()
   115  	bmp280.Start()
   116  
   117  	adaptor.i2cReadImpl = func([]byte) (int, error) {
   118  		return 0, errors.New("read error")
   119  	}
   120  	temp, err := bmp280.Temperature()
   121  	gobottest.Assert(t, err, errors.New("read error"))
   122  	gobottest.Assert(t, temp, float32(0.0))
   123  }
   124  
   125  func TestBMP280DriverPressureWriteError(t *testing.T) {
   126  	bmp280, adaptor := initTestBMP280DriverWithStubbedAdaptor()
   127  	bmp280.Start()
   128  
   129  	adaptor.i2cWriteImpl = func([]byte) (int, error) {
   130  		return 0, errors.New("write error")
   131  	}
   132  	press, err := bmp280.Pressure()
   133  	gobottest.Assert(t, err, errors.New("write error"))
   134  	gobottest.Assert(t, press, float32(0.0))
   135  }
   136  
   137  func TestBMP280DriverPressureReadError(t *testing.T) {
   138  	bmp280, adaptor := initTestBMP280DriverWithStubbedAdaptor()
   139  	bmp280.Start()
   140  
   141  	adaptor.i2cReadImpl = func([]byte) (int, error) {
   142  		return 0, errors.New("read error")
   143  	}
   144  	press, err := bmp280.Pressure()
   145  	gobottest.Assert(t, err, errors.New("read error"))
   146  	gobottest.Assert(t, press, float32(0.0))
   147  }
   148  
   149  func TestBMP280DriverSetName(t *testing.T) {
   150  	b := initTestBMP280Driver()
   151  	b.SetName("TESTME")
   152  	gobottest.Assert(t, b.Name(), "TESTME")
   153  }
   154  
   155  func TestBMP280DriverOptions(t *testing.T) {
   156  	b := NewBMP280Driver(newI2cTestAdaptor(), WithBus(2))
   157  	gobottest.Assert(t, b.GetBusOrDefault(1), 2)
   158  }